Mixing-machine.



A. J. CROPP.

MIXING MACHINE.

APPLICATION FILED ov. 29, 1911.

Y Patented Apr. 17, 191

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A. 1.; CROPP. MIXING MACHINE.

APPLICATION FILED NOV. 29.191].

Patented Apr. 17, 1917.

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A. J. CROPP.

MIXING MACHINE.

APPLICATION FILED NOV. 29. 1911.1

Patented Apr. 17, 1917.

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' f nm .1. external CHICAGO, ILLINOIS.

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a'azz aaamyaam Be it known that I,',A1-1'mmw J ormer, a citizen of the United States, residingat Chicago, in the county of Coo-k and State of Illinois, have invented certain new andiusev ful Improvementsin ,Mi X ing-Machin es, of Which the following is a specification.

This invention relates to improvements in i an apparatus which is intended for use in mixlng'. ingredients or materials employed in the production of concretev for any of the purposes for which it may be used, and of. that class of such machines in, which a rotary drum is adapted to' receive the material to be mixed, and which drum is provided internally with means to agitate and mix the material, the same being fed into the drum at one of its ends and discharged therefrom at its othe end, and it consists in certain peculiarities of the, construction, novel arrangement and operation of the various parts thereof, as will be hereinafter more fully set forth and specificallyv claimed.

The invention has for its objects to provide a machine of the above mentioned general character, which shall be simple. in construction, strong, and durable, and which shall have embodied therein means for effioiently and conveniently charging, for thoroughly performing the operation of mixing and for. discharging the mixture, when desired and in suitable quantities.

Another object is to provide means for permitting the'drum to be charged at a very low point, yet in sucha manner, that the slushy material will not work out of the chargingendof thedrum to clog. itsgear and retard its fotationj and so that a large opening will be provided at the front end of the drum to permit of an inner view thereof so that the operator can watch the mixture and operation of the parts of the scription and'explanation.

- in whichmachine. v n p Other objects and 1 advantages of the, mvention will be disclosed in the subj ined de- Figure 1 is a sectional. persp'ective view of a machine embodyingthe invention, the

section being taken on line l-1, of Fig. 2, I of'thedra'wl'ngs; v Fig. 2,- is a frontendview 1; the machine.

'1 Specification. of Letters'Patent. Application filed November 29, 1911. Serial Ne 6 63361.

Patented Ape-17,1917,

Fig.3, is a fragmental sectional viewtaken on line 3?-3, of Fig. 2, looking in the direction indicated by the arrows marked- 33, showing a portion'of the rotary drum and the charging chutetherefor. 7

Fig. 4, is a similar view of like parts taken on line 3 of Fig. 2, looking in the dil-f rection indicated. by the, arrows marked 4:- w l i I I Fig. 5, is a plan sectional view of aportion of the machine taken on line 55, of Fig. 6.

Fig. 6, i's'an inner-view of the front or charging end of the machine.

Fig. 7, is a detached-perspective view of olne of the baiiies or aprons of the charging c ute.

1 Fig. ,8, is a detached perspective view of a Q pair of the'deflectors which form the a s ing pockets ofthe'machinev Fig. 9, is a side view of a portion ofone of said deflectors illustrating a swinging charging chute. Fig. 11 is a perspectiveview partly in section of the charging end of the drum and the charging chute showing a modification in the construction of the drum, the section being taken on line 1111, of Fig. 12, looking in the direction indicated by the arrows. g

Fig.12, is an inner view of the front or charging end of the drum embodying' the construction shownin Fig. 11, but with the charging chute omitted. I ,v I

Fig. 13, is a sectional view of a portion of the front end of the drum embodying the modification shown Fig. 11, and illustrat the flanges of the drum to and through the other flange thereof.

ficat-ion-in the construction of the deflecting chute y to likeparts throu of the drawings.

While I have shown in Fig. 1, of :the

drawingsz'a View p ly in section and partly" 110 infperspective, of] a mlxmg machine h g We compartments, that is," a receiving an modification in the construction 0f the ing the deflecting chute leading from one of i 7 F'g. lfis a fragmental view of 'similar Pa s n .Fig. 15, is a similar view showing a modin Corresponding numerals of referencerefer 1 bout. the difi'erent views mixing chamber, and a storage chamber, yet my present invention relates to the charging or feeding end of the machine and the mechanism employed in connection therewith and for this reason the description of the apparatus will be restricted mainly to said portion and said mechanism, reference being had to the other parts of the machine in a general way only.

The reference numeral 12, designates the mixing receptacle which is cylindrical in shape and may be suitably mounted for rotation, but is shown in Fig. 1, of the drawings, as being provided with bandlike or circular gears 13, one of which 'is located on the outer surface of the drum or receptacle 12, near each of its ends and are adapted o engage gears on a driven shaft or shafts, not shown, which may be j ournaled on the supporting frame for the drum, which frame may be of the ordinary or any suitable construction, and is also not shown. The front or charging end of the drum 12, is provided with an inwardly extended annular flange 14 in the form of an'apertured disk, and the opposite or discharging end of the drum is provided with a head 15, through a suitable opening in which leads a discharging chute 16, which is tapered forwardly as shown. Horizontally located at or near the front end of the drum is a platform 17, on which wheelbarrows containing the different kinds of materials to be mixed, may be trundled in order'that their loads may be dumped into the mixing receptacle or drum. Extended upwardly from the platform 17, is an upright board or plate 18, which is located transversely with respect to the front end of the drum 12, and at a slight distance forwardly therefrom, and has in its upper portion a segmental recess 19, to receive a curved piece or sheet 20, of metal or other suitable material which is provided at each of its edges with an upwardly and .outwardly inclined portion 21, each of which is provided at its rear edge with an upwardly extended flange 22, which flanges rest? against or approximate the front surface of the flange 14, of the drum. The curved piece 20, is extended through the opening 23, of the flange 14, of the drum and some distance rearwardly of said flange as is clearly shown in difl'erent views of the drawings, and lies directly above the lower portion of the inner periphery of said flange. Located on the front or outer portion of the curved piece 20, is a segmental plate or,

board 24, from the upper edge of which is extended rearwardly and downwardly a chute plate 25, which is secured at its lower edge to the rear edge of the piece 20, and in conjunction with said piece andwith the uprights 18, and 24, form the charging chute of the machine, into the outer or front portion of which the material can be readily dumped from wheelbarrows trundled on the platform 17', therefor. Secured on the lower surface of the curved piece 20, of the charging chute and within the receptacle12, and near the inner surface of the flange 14, thereof, is a segmental apron or bafile plate 26, which extends in parallelism with said flange and upwardly some distance above that side of the chute plate 25, in the direction of the rotation of the drum, as will be readily understood by reference to Figs. 2 5, and 6, of the drawings. Inwardly of the baflie plate or apron 26, and at a slight distance therefrom, the curved portion 20, of the chute has mounted thereon another segmental baflie or apron 27, which is extended upwardly on one side of the chute plate 25, and in a corresponding direction with the plate or apron 26, but the last named apron terminates at its lower end at about the middle of the curved piece 20, as will be readily understood by reference to Fig. 6, of the drawings. The baflie plate or apron 27, is provided on its rear surface with one or more rearwardly extended wings 28, which are located at angles to the baflie or apron 27, and areinclined rearwardlyin the direction of the rotation of the drum.

As shown in Figs. 1, and 5, of the drawings, the drum 12, has secured thereto, near the flange 14, thereof, a series of overlap- F ping, diagonally, arranged deflectors 29, Y which are of a greater width than the front flange 14, which are extended from pointsat suitable distancesapart rearwardly fromthe flange 14, and have their front ends dis" posed at a slight distance from said flange. These'defiectors or plates may be secured to the inner surface of the-drum 12, by means of angle brackets 30, and are spaced apart, and have substantially the same diagonal inclination toward the rear portion ofthe drum thus forming circularly arranged pockets orchutes which have a tendency to cause the material to advance into the drum. 110

Between each of the deflectors or plates 29,

and the one adjacent thereto is pivotally mounted at its inner portion a door or gate 31, which are adapted to swing in the opposite direction of the rotation of the drum so as to permit the material to pass freelythrough the charging pockets formed by the deflectors or plates 29, but in the event of a the backward movement of said material, that is, toward the charging end of the drum, said gates or doors will bemoved forwardly thereby until they are stopped in such movement by means of projections 32, on the outer portions of the plates 29, or deflectors.

The drum 12, may be provided at about its middle with a transversely disposed partition 33, to divide it into two chambers, and said partition has a hinged door 34, to close a doorway 35, in said partition 130 through which the mixture passes from the mixingcl'iamber tothej storage or discharging"chamber, but said elements form no part ofmy'present invention, and for this reason they will not be herein further ref ferred to.

part 20, as shownin 10, of the 'draW- ings, which baflie plate or aprontmay be providedon its upper and rear surface with angularly disposed and rearwardly extended wings 28, (see Fig. 7,) if'desired.

In some instances I may provide the charging end of the drum 12, with an additional or supplemental inwardly extended flange 36, as shown in Figs. 11,] to 1 5, inclusive of the drawings, which flange is located on and secured to the inner peripheral wall of the drum 12, at a slight dis-' tance rearwardly'of the flange 14, and in parallelism therewith. When employing this construction the charging chute is extended rearwardly within the lower portions of the openings in the flanges 14, and 36, so as to project a slight distance rearwardly within the drum from the latter named flange as is clearly shown in Fig. 11, of the drawings, but so as to lie closely to the inner peripheries of said flanges. The portion 20, of the charging chute, in the construction nowv under consideration, is provided with a segmental baffle plate 26, which extends downwardly from the portion 20, about midway between the flanges l4, and 36, of the drum, and lies in parallelism therewith. Extended diagonally from the rear surface of the flange 14, and inwardly from the peripheral wall of the drum 12, is a plate 37, which is joined at its rear end to one edge of an opening 38, in the flange 36,- which arrangement will provide a. deflecting chute for any material that may fall or pass into the space between the flanges 14, and 36, of the drum. The

upper edge of the plate 37, may have ex-.

tended therefrom in the direction of the movement of the drum a hood 39, which will serve to assist in guiding the material from the space between said flanges, but it is obvious that this hood may be omitted as shown in Fig. .15, of the drawings.

From the foregoing and by reference to the drawings it will be readily understood and clearly seen, that as the drum 12, is rotated in the direction indicated by the arrows' shown in continuous lines in Figs. 1, 13, to 15, inclusive, of the drawings, the material placed therein by way of the charging chute will fall into the charging pockets formed by the deflectors or plates 29,

and will thereby be directed rearwardly of the drum. However, as the material while being mixed, is in a slushy state, it will have a tendency when considerable material is held in the drum, to work out through the space between the charging chute and the inner periphery of the flange 14, when only one flange on the drum is employed, and between the peripheries of the flanges 14, and 36, when the construction shown in Figs. 11, to 15, is employed, and to obviate this, the battle plates 26, and 27, when the construction shown in Figs. 1, 3, 4, 5, and 6, is 'used, are employed, and when the construction illustrated in Fig. 10 is used, the baffle plate or apron 27, is employed for this purpose, and when the construction illustrated in Figs. 11, to 15, inclusive is used, the baflie plate or apron 26 and the deflecting chute 37, is employed for the same purpose, for it is apparent that as the material rotates with or is carried up by the drum the rearwardly directed wings 28, in the first named construction, will again force it reaiwvardly into the charging pockets formed by the plates 29, or deflectors. In therotation of the drum indicated by the arrows in continuous lines inFigs. 13, to 15, inclusive, it will be understood that the material which is carried up by the drum will have a tendency to move therein in the direction indicated by the arrows in dotted lines in said figures, so that the material which may pass or find its way into the space between the flanges 14, and 36, of the drum will be deflected by means of: the baflie plate or apron 26, and be caused to pass from said space rearwardly into the drum by reason of the deflecting chute 37, which is located between said flanges.

Having thus fully described my invention what I claim as new and desire to secure by Letters Patent is 1. In a mixer, in combination, a revoluble drum having an annular front end wall, means therein to mix and agitate the materials, and a low charging device consisting of blades of a greater width, than the front end wall of the drum from the opening therein to the periphery, said blades overlapping at their inner ends, forming a receiving means in front of a charging means and also upon revolution of the drum, a re-' taining means.

2. In a mixer, in combination, a revoluble drum, having at its front end, two inwardlyextending annular flanges, and a continuous series of blades, having their front portions, of a greater height, than said flange, said blades being set at an angle from and running rearwardly for a short distance, said blades being spaced'apart forming a channel, so as to charge and retain the material in the drum.

3. In a mixer, in combination, a revoluble drum, means therein to mix the material, a low charging device consisting of an inwardly extending annular .flange and a. series of blades extending from a short distance from said flange and set at an angle to the axis of the receptacle, and extending backwardly for a short distance for the purpose of directing the material into the receptacle, said blades running parallel With each other for a short distance, and a gate mounted between said blades, said gate having a'free swinging movement in one direction only and restricted in the other direc-- tion for the purpose of stopping the return flow of loose concrete.

4. In a mixer, in combination, a revoluble drum, having on its front end, two inwardly extending annular flanges, the rear flange having openings adjacent to the drum for the return of overflow material.

5. In a mixer, in combination, a revoluble drum, having on its front end, two inwardly extending annular flanges, the rear flange. having openings adjacent to the drum for the return of overflow material, and a blade extending from one side of the opening in the rear flange, at an angle to the axis and forwardly to the one side of the first flange for the purpose to guide overflow material.

6. In a mixer, in combination, a revoluble drum, having on its front end, two inwardly extending annular flanges, the rear flange having openings adjacent to the drum for the return of overflow material, and a blade extending from one side of the opening in the rear flange, at an angle to the axis and forwardly to the one side of the first flange for the purpose of guiding overflow material back into themixer, and a charging chute the opening therein to its periphery, said blades over-lapping sufficiently toform pro tecting walls for the material being charged and retaining walls for the material already in the drum upon rotation of the drum.

8. In a mixer, in combination, a revoluble drum, having means to discharge the mixed material, and a charging device, comprising of narrow flanges in combination with Wide blades.

9. In a mixer, in combination, a revoluble I drum having two inwardly extending flanges at its receiving end, the rear one of said flanges having a series of openings peripherally arranged therein with blades extending, at an angle to the aXis of the receptacle, from one side of the openings forwardly to the first flange, and a charging device, consisting of blades, :being of a greater height than said flanges at their front portions.

ANDREW J. CROPP.

Witnesses:

CHAS. C. TILLMAN E. N EWSTROM. 

